You may have heard about IBM's Jeopardy-playing Watson supercomputer. You may have also heard…
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Esquire's got a fun interview this month with Ken Jennings, whose full Jeopardy bout with Watson will air this coming Monday. In it, they note just why, exactly, it's so hard for man to beat machine:

Perhaps more alarmingly for the humans standing on either side of it, Watson will be hard-wired into the game board. When those banks of lights come to life, Watson will be triggered by an electrical impulse. Jennings's and Rutter's nervous systems will be racing against a higher voltage, and it's been a long time since anyone could turn off the lights and get into bed before the room got dark.